THE Northern Rivers may play host to an all-star cast of Hollywood celebrities, with Mel Gibson planning to film his latest film in NSW.

Hacksaw Ridge will be the true story of Second World War army medic Desmond Doss, who served in the Battle of Okinawa and was America's first conscientious objector to win a Congressional Medal of Honour.

Gibson and Deputy Premier Troy Grant on Thursday announced the film would be shot in Sydney and parts of "regional NSW", but were tight-lipped on the actual locations.

"I can't think of a better place to shoot this film than here in Sydney and NSW, where I was fortunate to have grown up and started my career," Gibson said.

"The support from the NSW government has been overwhelming in ensuring the best production value possible."